Component used:
Fragment 1.3.0
Leanback 1.1.0-beta01 Devices/Android versions reproduced on: GoogleTV
When using the above components together, there are two problems:
GuidedStepSupportFragment transition (both UI_STYLE_ENTRANCE and UI_STYLE_REPLACE style) doesn't run properly
The App crashed the second time calling GuidedSupportFragment.add.
2021-02-11 12:15:58.811 29784-29784/com.example.guided_step_transition_bug E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.guided_step_transition_bug, PID: 29784
    java.lang.IllegalArgumentException: Unique transitionNames are required for all sharedElements
        at androidx.fragment.app.FragmentTransaction.addSharedElement(FragmentTransaction.java:599)
        at androidx.leanback.app.GuidedStepSupportFragment.addNonNullSharedElementTransition(GuidedStepSupportFragment.java:557)
        at androidx.leanback.app.GuidedStepSupportFragment.onAddSharedElementTransition(GuidedStepSupportFragment.java:534)
        at androidx.leanback.app.GuidedStepSupportFragment.add(GuidedStepSupportFragment.java:511)
        at androidx.leanback.app.GuidedStepSupportFragment.add(GuidedStepSupportFragment.java:476)
        at com.example.guided_step_transition_bug.ExampleGuidedStepFragment.onGuidedActionClicked(MainActivity.kt:35)
        at androidx.leanback.app.GuidedStepSupportFragment$2.onGuidedActionClicked(GuidedStepSupportFragment.java:1107)
        at androidx.leanback.widget.GuidedActionAdapter.performOnActionClick(GuidedActionAdapter.java:451)
        at androidx.leanback.widget.GuidedActionAdapter$1.onClick(GuidedActionAdapter.java:130)
        at android.view.View.performClick(View.java:7140)
        at android.view.View.performClickInternal(View.java:7117)
        at android.view.View.onKeyUp(View.java:14165)
        at android.view.KeyEvent.dispatch(KeyEvent.java:2824)
        at android.view.View.dispatchKeyEvent(View.java:13374)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1917)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at androidx.leanback.widget.BaseGridView.dispatchKeyEvent(BaseGridView.java:1081)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at androidx.leanback.widget.GuidedActionsRelativeLayout.dispatchKeyEvent(GuidedActionsRelativeLayout.java:75)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1922)
        at com.android.internal.policy.DecorView.superDispatchKeyEvent(DecorView.java:453)
        at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1839)
        at android.app.Activity.dispatchKeyEvent(Activity.java:3968)
        at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.java:122)
        at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:84)
        at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.java:140)
        at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:535)
        at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
        at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:2533)
        at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:367)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:5413)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5281)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4841)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4807)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4947)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4815)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5004)
2021-02-11 12:15:58.813 29784-29784/com.example.guided_step_transition_bug E/AndroidRuntime:     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4841)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4807)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4815)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4788)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4841)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4807)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4980)
        at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:5141)
        at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:3064)
        at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:2607)
        at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:2598)
        at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:3041)
        at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:143)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:336)
        at android.os.Looper.loop(Looper.java:174)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
When using Fragment 1.2.5, there is no problem.
Sample project attached.